Reptile not eating: common causes and fixes that actually work

Quick answer

A reptile that stops eating is often reacting to temperature, lighting, or stress. Before changing food, check husbandry. Appetite usually returns once the enclosure setup and routine are correct. If the reptile is losing weight, lethargic, or showing respiratory signs, contact an exotics vet.

First: what is normal vs not normal?

• Many reptiles eat less during settling in.
• Some species have seasonal slowdowns.
• A missed meal can be normal.

What is not normal is rapid weight loss, weakness, or obvious illness signs.

The 7 checks that solve most cases

1. Warm side temperature: verify with a reliable thermometer.
2. Cool side temperature: confirm there is a true cool zone.
3. UVB and light schedule: consistent day-night cycle when relevant.
4. Hides and stress: at least two hides and minimal disturbance.
5. Prey size and feeding method: too large, too small, or wrong presentation can matter.
6. Shedding: appetite can drop before or during a shed.
7. Hydration: dehydration can reduce appetite.

What to do for the next 72 hours

• Keep the environment stable.
• Reduce handling.
• Offer food at the species-appropriate time of day.
• Remove uneaten food quickly.
• Track weight weekly if possible.

Avoid rapid "fixes" that change everything at once.

When to call a vet

Call an exotics vet if you see:

• wheezing, open-mouth breathing, bubbles around the nose
• swelling, wounds, or persistent diarrhea
• parasites visible in stool
• rapid weight loss or severe lethargy

FAQ

Should I change the food immediately?

Not first. Check temperatures and stress factors before switching diets.

Can handling cause a reptile to stop eating?

Yes. Many reptiles need time and routine before they feel safe.

What is the biggest beginner cause of appetite loss?

Incorrect temperatures, especially not having a true basking spot and gradient.

Next step

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